Turadg Aleahmad Vincent Aleven Robert E. Kraut Open Community Authoring of Targeted Worked Example Problems. 216-227 2008 Intelligent Tutoring Systems https://doi.org/10.1007/978-3-540-69132-7_26 https://www.wikidata.org/entity/Q66715131 conf/its/2008 db/conf/its/its2008.html#AleahmadAK08